Adsorption medium reactor, espectially fluidized bed reactor

ABSTRACT

A fluid-permeable wall component of a sandwich-type construction has a slotted hole screen with substantially parallel extending vertical slot-limiting elements. A stabilizing grate is connected to the slot-limiting elements and includes connecting rods extending transverse to the slot-limiting elements and a louver-type construction with slats that extend transverse to the slot-limiting elements. The wall component is employed in an adsorption medium reactor of the fluidized bed type as a dividing wall for dividing the treatment chamber into compartments or an outer limiting wall. It retains particles of the adsorption medium within the divided compartments of the treatment chamber without obstructing the transverse fluid flow and allows separate removal of adsorption medium from either compartment.

BACKGROUND OF THE INVENTION

The invention relates to an adsorption medium reactor, especially afluidized bed reactor, through which the fluid to be treated is guidedin a transverse flow and which has at least one substantially vertical,fluid-permeable wall. Furthermore, the invention relates to a fluidpermeable wall component that is especially suitable as a wall for anadsorption medium reactor.

Adsorption medium reactors with a continuous fluidized bed or aquasi-continuously fluidized bed of a granular adsorption medium havefound growing application for flue gas scrubbing. During flue gasscrubbing certain fluid flow distances and thus certain reactorcross-sections are needed. Insofar as the flue gas to be scrubbedcontains highly toxic contaminants, for example, dioxines, furanes, orheavy metals, these components are already adsorptively separated in arelatively thin vertical layer of the fluidized bed column at theinflow. In conventional reactors without vertical division the entireamount of the adsorption medium contained within the reactor must bedisposed of as hazardous waste after removal from the reactor, forexample, must be combusted at 1200° C. and a residence time of at leasttwo seconds. This form of disposal is extremely expensive.

From German Patent 19 46 457 a fluidized bed reactor is known in which asecond row of relief sheet metal panels is provided within the reactorin addition to the inflow and outflow guide slats of a louver-typearrangement which extend substantially parallel to the inner sides ofthe guide slats. The relief sheet metal panels compensate a portion ofthe static lateral pressure of the downwardly flowing adsorbing mediumand have the effect that the adsorbing medium between two guide slats isrelieved of lateral pressure and can combine with the main stream of theadsorbing medium in the center of the fluidized bed.

From German Offenlegungsschrift 26 26 939 a fluidized bed reactor of theaforementioned kind is known in which in the fluidized reactor bed twoadsorption medium layers are formed and are separated from one anotherby fluid-permeable walls. The known gas-permeable walls are in the formof plates with holes or as a louvre-type construction with oppositelyslanted slats. They serve for varying the throughflow velocity of thefluid and supposedly present a compromise between a substantiallycomplete loading of the entire adsorbing medium on the one hand and asufficient scrubbing of the flue gas on the other hand. A reliableseparation of the adsorption medium layers into layers that are greatlyloaded with toxic materials and layers that are loaded to a lesserextent is not provided for in the known embodiment and is not easilyachievable.

For reliably separating a fluidized bed into two or more vertical layersof varying degrees of contaminant loading, plates with holes have beenused in the past. In this context relatively great openings must beprovided in the dividing walls in order to reduce the risk of clogging,increase of flow resistance, and non-uniform fluid distribution over thefluidized bed. Such known walls have the disadvantage that an exactparticle separation between neighboring vertical layers cannot beachieved. The known oppositely slanted louver-type constructions (GermanOffenlegungsschrift 26 26 939) require a substantial amount of spacewithin the interior of the reactor and cause a relatively largecollection of adsorption medium inhibiting uniform flow resistance overthe height of the reactor.

It is therefore an object of the invention to provide for a simple,exactly defined separation between two vertical layers while reliablypreventing a particle exchange without considerably inhibiting the fluidflow.

SUMMARY OF THE INVENTION

Inventively, this object is solved by providing the fluid-permeable wallat the inflow in the form of a slotted hole screen with slot-limitingelements extending from the top to the bottom, whereby the width of theslots is adjusted to the size of the particles of the adsorption mediumsuch that the solid particles, with the exception of very fineparticles, are retained within the inflow portion of the treatmentchamber, the slotted hole screen being connected to a stabilizing gratewhich is comprised of connecting rods extending transverse to theslot-limiting elements, and at the outflow of the stabilizing grate alouver-type construction with transversely extending slats.

The fluid-permeable wall component in a sandwich-type constructionaccording to the present invention is primarily characterized by:

a slotted hole screen with substantially parallel extendingslot-limiting elements; and

a stabilizing grate comprising:

a) connecting rods extending transverse to said slot-limiting elements;and

b) a louver-type construction with slats extending transverse to saidslot-limiting elements.

The stabilizing grate further comprises a plurality of connecting stripsconnected to the connecting rods in a crossed arrangement.

Preferably, the slot-limiting elements, the connecting bars, theconnecting strips, and the edges of the slats facing the stabilizinggrate are connected in an alternately perpendicularly crossed manner inthe sequence given. Expediently, the slats are slanted relative to theslot-limiting elements.

In a preferred embodiment of the present invention, the slot-limitingelements are spot-welded to the connecting rods.

Preferably, the stabilizing grate further comprises substantiallyvertical channels, each vertical channel defines between two neighboringconnecting strips and serving to remove very fine particles penetratingthe wall component.

The slot-limiting elements have a substantially triangular cross-sectionwith three sides and three corners, wherein one side forms a limitingsurface of the fluid-permeable wall component and the corner oppositethat side is connected to the connecting rods of the stabilizing grate.

The adsorption medium reactor with a fluidized bed for transverse flowof a fluid to be treated according to the present invention is primarilycharacterized by:

at least two substantially vertical fluid-permeable walls with an inflowand an outflow side, with at least one wall comprised of afluid-permeable wall component in a sandwich-type construction,comprised of: a slotted hole screen with substantially parallelextending slot-limiting elements positioned substantially vertically andwith slots between the slot-limiting elements, and a stabilizing grate.

The stabilizing grate comprises connecting rods extending transverse tothe slot-limiting elements, a plurality of connecting strips connectedto the connecting rods in a crossed arrangement, and a louver-typeconstruction with slats extending transverse to the slot-limitingelements. The slats are located at the outflow side of the wallcomponent.

The slotted hole screen is located at the inflow side and the slots havea width adapted to the size of particles of the adsorption medium suchthat the particles, with the exception of very fine particles, areretained by the slotted hole screen on the inflow side.

The fluid-permeable wall component can be used as a limiting wall of thereactor at the inlet or outlet side or as a dividing wall between twocompartments.

The connecting strips have flat wide sides and narrow sides, the widesides extending substantially vertically and parallel to the transverseflow of the fluid.

The slot-limiting elements have a substantially triangular cross-sectionwith three sides and three corners, with one side positioned at theinflow side and with the corner opposite that side connected to theconnecting rods of the stabilizing grate.

The stabilizing grate further comprises substantially vertical channels,each vertical channel defined between two neighboring connecting stripsand serving to remove very fine particles of the adsorption mediumpenetrating the wall component. Preferably, a removal funnel isconnected to lower ends of the vertical channels.

The slot-limiting elements are expediently straight rods,

In a preferred embodiment, the slotted hole screen is comprised of aplurality of vertical sections positioned one above the other such thata lower vertical section is overlapped by an adjacent higher positionedvertical section when viewed in the direction of transverse flow of thefluid.

The vertical sections each have an angled upper end and a flat lowerend. Preferably, the stabilizing grate is comprised of individualstabilizing sections for each vertical section, wherein each stabilizingsection is connected to the flat lower end of a corresponding verticalsection.

The slot-limiting elements of each vertical section are aligned with theslot-limiting elements of respective neighboring vertical sections.

The slotted hole screen can limit the reactor on an outlet side thereof.Preferably, the slats are then slanted in an upward direction and arepreferably slanted at an angle of between 25 to 35° to the vertical.

The stabilizing grate further comprises substantially verticallyextending channels, whereby each vertical channel is defined between twoneighboring connecting strips and serves to remove very fine particlesof the adsorption medium that are able to penetrate the wall component.The slats are slanted such that the very fine particles of theadsorption medium are downwardly guided into the vertical channels bygravity.

In a preferred embodiment of the present invention, the fluidized bed ofthe reactor is divided by at least one fluid-permeable wall componentinto a first and a second compartment and the slats are downwardlyslanted. The slats are slanted at an angle of between 15 and 25°relative to the vertical.

Preferably, a first removal device for the first compartment and asecond removal device for the second compartment are provided forselectively removing the adsorption medium from and adjusting theadsorption medium in the first and the second compartments.

The fluidized bed advantageously has a first fluid-permeable wallcomponent as an inlet and a second fluid-permeable wall component as anoutlet. Preferably, the distance between the fluid-permeable wallcomponent dividing said fluidized bed into compartments and the outletis multiple times greater than the distance between the fluid-permeablewall component dividing the fluidized bed into compartments and theinlet.

The inventively provided combination of a slotted hole screen with astabilizing grate extending over the entire limiting wall hasconsiderable constructive and functional advantages within theadsorption medium reactor of the invention. The slotted hole screenessentially forms a smooth surface without discontinuities at which theparticle stream of the adsorption medium can essentially flow in oneplane from the top to the bottom. Particles of a standard size areretained at the inflow by the limiting wall. The fluid stream, on theother hand, is substantially uninhibited over the entire height of thelimiting wall. The crossed arrangement of the slot-limiting elements,the stabilizing grate, and the slats ensures an extremely high formstability, stiffness and general stability so that the properties andthe shape of the limiting wall itself is not changed when the load onboth sides of the limiting wall fluctuates greatly, for example, byselectively loading or removing adsorption medium on either side of adividing wall.

A further increase of the stability of the limiting wall can be achievedin a further embodiment of the invention by providing within thestabilizing grate on the outflow side a plurality of connecting stripswhich cross the connecting rods whereby the flat sides of the connectingstrips extend from the top to the bottom and substantially parallel tothe fluid flow direction.

A fluid-permeable wall component which is suitable as a limiting wall atthe reactor outlet side as well as a dividing wall between twocompartments of the reactor, is inventively characterized by asandwich-type construction of the wall component that is constructed of:a slotted hole screen with substantially parallel extendingslot-limiting elements; a stabilizing grate comprised of transverseconnecting rods extending transverse to the slot-limiting elements andconnecting strips spaced apart from one another and crossing theconnecting rods, whereby the wide sides of the connecting strips aresubstantially parallel to and extend in the layering direction; and alouver-type construction with slats extending transverse to theslot-limiting elements.

Depending on the arrangement of the louver-type construction at an outerlimiting wall or at a dividing wall located within the reactor itselfthe slats preferably have different slants. In correlation to a reactoroutlet wall the slats have primarily the object to catch the very fineparticles penetrating the slot-limiting elements and directly guidethem, if possible, into a removal device. In this function the slatsextending from the connecting strips, extend upwardly at a slant,preferably, at an angle of approximately 25 to 35° relative to thevertical plane.

When corresponding to a dividing wall, the slats of the louver-typeconstruction are slanted in a downward direction. The angle of slant isbetween 15 to 25°, especially approximately 20°, relative to thevertical. This is advantageous because the angle of slant in thisembodiment combines the advantages of a reliable deflection of theparticle flow at the outlet side of the dividing wall and a relativelylow wall thickness and compact construction.

The use of a slotted hole screen extending over the entire outflowcross-section of the reactor in connection with the stabilizing grateand substantially vertically extending connecting strips has thefollowing advantage: On the one hand, only very fine particles can exitfrom the reactor chamber into the area of the louver-type constructionso that the tendency for pile formation of adsorption medium issubstantially decreased; on the other hand, the connecting strips,vertically extending within the stabilizing grate, facilitate theremoval of very fine particles of the adsorption medium in a downwarddirection because they delimit vertically extending channels or chutesbetween the slotted hole screen on the one hand and the louver-typeconstruction with the slanted slats on the other hand. The openingcross-section for the fluid is uniformly distributed over the entireheight of the outlet side of the wall. This does not change withadvancing reactor operation. Collection of adsorption medium, which inall known constructions are the cause of more or less non-uniformnesswithin the flow resistance and thus within the flow profile of thefluid, are practically nonexisting.

As a dividing wall the inventive wall component provides theprerequisite for the adsorption medium flows to be of differentvelocities in both vertical chambers on either side of the wall.

The vertical layer on the inlet side which must be disposed of ashazardous waste can be almost completely loaded before removal. Theadjacent at least one vertical layer within the main body of theadsorption medium fluidized bed can be removed continuously orbatch-wise at a completely different removal cycle. This layer which issubstantially free of any highly toxic contaminants can be disposed ofwith relatively simple means, can be recycled, or combusted inconventional combustion devices in an inexpensive manner.

The thickness and the cross-section of the individual compartments andthus the position of the dividing walls can be selected depending oncertain contaminants, respectively, pollutants within the fluid and withrespect to a desired separation characteristic. Especially, it ispossible to introduce a plurality of dividing walls within the reactorsuch that the transversely flowing fluid flows consecutively through atleast two dividing walls and three compartments. Within the individualcompartments separated by dividing walls different filling materials,for example, more or less active adsorption mediums, can be used atidentical or different filling heights. The invention thus can beemployed independent of the transverse flow medium and the adsorptionmedium flow with principally the same advantages.

The distance of the at least one dividing wall to the fluid outlet wallis preferably multiple times greater than the distance to the fluidinlet wall. This has the advantage that the inlet compartment can haverelatively small dimensions and the layer volume can be reduced to asize required for the adsorption of the volatile highly toxiccomponents.

The inventive wall component can be used within an adsorption mediumreactor as a limiting wall at the fluid outlet of the reactor as well asat least one dividing wall with the aforementioned advantages. On theother hand, the outlet limiting wall can also be used with an undividedreactor and, conversely, one or more dividing walls of the inventivekind can be used in connection with conventional reactors.

Advantageous further developments of the invention may be taken from thedependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following, the invention will be explained in detail with the aidof the embodiment represented schematically in the drawings. Thedrawings show:

FIG. 1 a schematic vertical cross-section through a portion of afluidized bed reactor with inventively embodied dividing and limitingwalls;

FIG. 2 a horizontal section through a portion of an inventive wallcomponent, i.e., a dividing wall, respectively, a portion of the reactoroutlet wall according to FIG. 1 with a slotted wall comprised of aslotted hole screen a stabilizing grate and a louver-type construction(section II--II of FIG. 1);

FIG. 3 a cross-sectional view, reduced relative to FIG. 2, through aportion of the dividing wall;

FIG. 4 a sectional view according to FIG. 3 through a portion of thereactor outlet wall according to FIG. 1;

FIG. 5 a further embodiment of a slotted wall arrangement according toFIG. 4; and

FIG. 6 a further embodiment of a slotted wall arrangement that can beused as an outlet wall of the reactor as well as a dividing wall.

DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1 shows a schematic vertical cross-section through a portion of anembodiment of the adsorption medium reactor 1, called "adsorber" in thefollowing. The adsorber 1 in the shown embodiment has a rectangularcross-section. It comprises a reaction container 2 which encloses atreatment chamber 3. The reaction container 2 comprises a supply withmatrix-like arranged supply funnels for uniformly distributing theadsorption medium over the cross-section of the treatment chamber 3 anda removal bottom 6, 6a with a plurality of removal funnels for removingthe adsorption medium from the treatment chamber 3.

A substantially vertically extending dividing wall 7 divides thetreatment chamber 3 into two compartments 3a and 3b. The compartment 3afaces the inlet louver-type arrangement 9 and the compartment 3b extendsfrom the outflow side of the dividing wall 7 to the oppositely arrangedreactor outlet wall 8.

The fluid to be treated, in the embodiment this fluid is a flue gas,flows through the adsorber 1 in a manner indicated by dotted lines,respectively, arrows. The flue gas enters the adsorber 1 from thebottom, surrounds the removal bottom 6 with the removal funnels and theremoval sockets, and enters via a gas inlet box and the inletlouver-type construction 9 over the greatest portion of the constructiveheight of the reaction container 2 into the inflow compartment 3a. Theangle of slant of the sheet metal panels forming the inlet louver-typeconstruction 9 is 70°+5° relative to the horizontal and the describedembodiment. The fluidized bed in the treatment chamber is exposed to afluid flow in the transverse direction, as indicated by the flow lines.The fluid exits at the outlet side through the outlet wall 8 and thelouver-type construction 10 into a gas outlet box. The outlet sidelouver-type construction 10 is comprised of vertically stacked slats,which in the shown embodiment are slanted at an angle of 60°+5°,preferably 60° to 65°, to the horizontal.

The inventive new aspects relate especially to the design of thevertically extending dividing wall 7 in the shown embodiment and thesimilarly designed exit wall 8 of the reactor container These newaspects will be explained in the following with the aid of the schematicpartial side views according to FIGS. 2 to 4.

As can be seen especially in the enlarged horizontal cross-sectionalview according to FIG. 2, the dividing wall 7, respectively, the wall 8is embodied as a slotted wall. The slotted wall is comprised of aninflow slotted hole screen 13 with slot-limiting elements 13a extendingfrom the top to the bottom and having a rod shape of a uniformtriangular cross-section. The slotted hole screen 13 is connected in asandwich-type manner to a stabilizing grate 14. For a conventionalparticle size of active charcoal used as an adsorption medium theslot-limiting elements 13a have a gap width of 1.25 mm+0.5 mm, a sidelength of the side facing the active charcoal bed of 2.2 mm+0.5 mm, anda depth to the stabilizing grate of 4.5 mm to 1.0 mm. These dimensionscorrespond however only to a prototype embodiment of the presentinvention. Especially the width of the slots 13b between two neighboringslot-limiting elements 13a depends expediently on the size of theparticles of the adsorption medium which are to be retained by theslotted hole screen in the inlet compartment 3a, respectively, at theoutlet wall 8 within the outlet compartment 3b.

The stabilizing grate according to FIG. 2 is comprised of connectingrods 15 which extend transversely to the slot-limiting elements 13a andis further comprised of connecting strips 16 which extend parallel tothe slot-limiting elements and are spaced from one another at a greaterdistance. The longitudinally extending rod-shaped slot-limiting elements13a are spot-welded to the connecting rods 15 which are spaced at agreater distance relative to one another. On the other side, theconnecting strips 16 are welded to the transversely extending connectingrods 15. Additionally, the connecting strips 16 with their narrow sidesfacing away from the connecting rods 15 can be connected to twistedsquare bars 18, as shown in FIG. 2, whereby a welded connection isespecially preferred. These square bars 18 and the connecting strips 16are commercially available as a constructive unit (for differentpurposes), and are thus used accordingly in the present invention. Thesquare rods 18 can also be used instead of the rectangular or roundconnecting rods 15.

As mentioned before, the outlet wall 8 of the reactor treatment chamber3 in the described embodiment is provided with an approximatelyvertically extending slotted wall 12 substantially identical to thedividing wall 7. In this context, the adsorption medium is retained atthe slotted wall 12 of both walls 7 and 8 at the inflow side at least tosuch an extent that its particle diameter is greater than the slot width13b of the slotted hole screen 13. Insofar as very fine particles canpenetrate the slots 13b in the direction of fluid flow (arrow A in FIG.2), they reach vertical channels 17, positioned between the wide sidesof the connecting strips 16, and fall through these (continuous)channels in a downward direction into the removal area which for theoutlet wall in FIG. 4 is designated at 19. In the removal area thesefine particles are either recycled into the neighboring removal funnelof the removal bottom 6 or optionally separated and removed in order tocontinuously reduce the technologically unfavorable dust component.

In contrast to conventional transverse flow adsorbers no substantialcollection of adsorption medium can be found at the slanted louvre typeslats 10 at the outlet of the reactor container 2 so that the fluid issubjected to a uniform flow resistance over the entire height of thereactor container at the outlet. Insofar the slant angle of theindividual slats 10 of the louver-type arrangement is not critical;preferably, the angle of slant is however large enough in order to beable to guide the collected adsorption medium from the slats 10 into thechannel 17 for removal. For this purpose, an angle of approximately60°+5° to the horizontal plane has been proven expedient for the slats10.

As an exception to the otherwise identical embodiment of the slottedwalls 12 of the walls 7 and 8 the dividing wall 7 at the outflow sidefacing the compartment 3b has a different arrangement of the slats 20.The slats 20 extending from the slotted wall 12 are downwardly slantedin the direction to the compartment 3b. The angle of slant to thevertical is 20°+5° and has been proven to be expedient in order to, onthe one hand, ensure a relatively free fluid flow and, on the otherhand, to prevent a passage of the adsorption medium from the compartment3b into the inflow compartment 3a in a reliable manner. The acute angleto the vertical provides for an acceptable, reduced space requirement ofthe wall 7 including the slats 20 within the reactor.

As can be seen in the drawings, the columns of adsorption medium withinthe compartments 3a and 3b divided by the wall 7 are separated from oneanother continuously until they reach the individually coordinatedremoval areas. The inflow layer within the inflow compartment 3a isprovided with its own removal funnel 6a. Larger particles penetratingthrough the slot-limiting elements 13a from the compartment 3a fallthrough the channel 17 vertically downwardly when entering the spacebetween the connecting strips 16 and are guided by the panel 19' intothe removal funnel 6a. A passage of these contaminated particles intothe compartment 3b is prevented. The relatively narrow adsorption mediumcolumn within the compartment 3a can be removed independently of themain bed within the compartment 3b via the removal funnel 6a and can betransferred to a suitable disposal facility, for example, can betransferred as hazardous waste to a corresponding combustion device. Inthis relative narrow layer practically all highly toxic components suchas dioxine and furanes are adsorptively removed. After passing throughthe divider wall 7 the other contaminants are separated along a, forexample, nine times greater travel path of the fluid through the outletcompartment 3b in an adsorptive manner. The disposal of the consumed,respectively, loaded adsorption medium of compartment 3b is relativelysimple and not problematic. This adsorption medium can optionally beregenerated and recycled into the reactor container 2.

A continuous embodiment of the slot-limiting elements 13a as well as ofthe parallel extending connecting strips 16 which are spaced at agreater distance is preferred with respect to cost considerations. Onthe other hand, these vertically extending components 13a and 16 mayalso be assembled from a plurality of parts in an abutting fashion or bytoothing together or overlapping. Especially with respect to theconnecting strips 16 it is sufficient when they extend over a partiallength of the reactor height such that the slats of the louver-typeconstruction 10 can be connected thereto, especially welded thereto. Adisruption of the connecting strips 16 is of no consequence for thereliable removal of the very fine particles through the channel section17 because a particle exchange between adjacent channels 17 of theparticle guidance from the top to the bottom is not adversely affectedand because the slanted slats 10 have a downward orientation.

FIGS. 5 and 6 show embodiments of slotted walls 40 and 50 in which theslotted hole screen is comprised of a plurality of vertical sections41a, 41b, respectively 51a to 51c which are arranged in an overlappingfashion. In the embodiment according to FIG. 5 each slotted hole screensection at its upper end 42 is angled twice and is positioned behind thelower end 43 of the higher slotted hole screen section 41a. Theindividual slot-limiting rods are vertically aligned relative to oneanother within the overlapping slotted screen sections 41a and 41b. Inthe alternative embodiment according to FIG. 5 a stabilizing grate 44with transversely extending connecting rods 45 and with connectingstrips 46 delimiting removal channels 17 is provided. The connectingstrips 46 however are vertically interrupted and only the planarportions of the slotted hole screen sections 41a, respectively, 41b arecoordinated therewith. The slats connected to the connecting strips 46in FIGS. 5 and 6 are not represented.

In the embodiment according to FIG. 5 the vertical limiting plane of theadsorption medium bed within the overlapping area of the slotted holescreen sections 41a and 41b is disrupted. Here small piles of adsorptionmedium 47 are collected. Due to the free space within the area of theoverlapping portion on the other side of the collection 47 the increaseof the flow resistance is of no importance. The disruption of theslot-limiting elements respectively, of the slots 13b therebetween hasthe advantage that especially longitudinal particles of the adsorptionmedium that are caught within the slots 13b, can be released from theslots and especially in the area of the collection 47 can be reoriented.

A similar effect can be achieved with the embodiment represented in FIG.6. The effective slot-limiting elements within the slotted hole screensections 51a to 51c extend substantially slightly slanted to the generalvertical movement orientation of the adsorption medium within thetreatment chamber 3. Due to the slanted orientation of the slotted holescreen sections the embodiment according to FIG. 6 is only provided withone angled portion within the overlap area 52.

For the embodiment according to FIG. 6 a stabilizing grate iscoordinated with each individual slotted hole screen section 51a to 51c.Represented in FIG. 6 are only the transversely extending connectingrods 55.

Within the gist of the inventive concept a number of variations arepossible. For example, the individual components belonging to theslotted wall 12 can be provided with rounded edges and, underconsideration of the stabilizing requirements, can have great distancesand/or a reduced wall thickness. The outflow side can optionally behorizontally curved or polygonal and can be embodied in sections. Theembodiment of the louver-type arrangement is of no importance due to thespecial support and holding function of the slotted wall 12, 40, 50. Thesize of the channels should be selected such that, on the one hand, thespace requirement is reduced and, on the other hand, a reliable removalof the fine particles penetrating the slotted hole screen is ensuredunder the force of gravity.

The present invention is, of course, in no way restricted to thespecific disclosure of the specification and drawings, but alsoencompasses any modifications within the scope of the appended claims.

What I claim is:
 1. An adsorption medium reactor with a fluidized bedfor transverse flow of a fluid to be treated, said reactor comprising:atleast two substantially vertical fluid-permeable walls with an inflowand an outflow side, with at least one said walls comprised of afluid-permeable wall component in a sandwich-type construction,comprised of:a) a slotted hole screen with substantially parallelextending slot-limiting elements positioned substantially vertically andwith slots between said slot-limiting elements; and b) a stabilizinggrate comprising:b1) connecting rods extending transverse to saidslot-limiting elements, b2) a plurality of connecting strips connectedto said connecting rods in a crossed arrangement, and b3) a louver-typeconstruction with slats extending transverse to said slot-limitingelements, said slats located at said outflow side of said wallcomponent; andwherein said slotted hole screen is located at said inflowside and said slots have a width adapted to the size of particles of anadsorption medium such that the particles, with the exception of veryfine particles, are retained by said slotted hole screen on said inflowside.
 2. A reactor according to claim 1, wherein said connecting stripshave flat wide sides and narrow sides, said wide sides extendingsubstantially vertically and parallel to the transverse flow of thefluid.
 3. A reactor according to claim 1, wherein said slot-limitingelements have a substantially triangular cross-section with three sidesand three corners, with one said side positioned at the inflow side andwith one said corner opposite said one side connected to said connectingrods of said stabilizing grate.
 4. A reactor according to claim 1,wherein said stabilizing grate further comprises substantially verticalchannels, each said vertical channel defined between two neighboringones of said connecting strips and serving to remove very fine particlesof the adsorption medium penetrating said wall component.
 5. A reactoraccording to claim 4, further comprising a removal funnel connected tolower ends of said vertical channels.
 6. A reactor according to claim 1,wherein said slot-limiting elements are straight rods.
 7. A reactoraccording to claim 1, wherein said slotted hole screen is comprised of aplurality of vertical sections positioned one above the other such thata lower one of said vertical sections is overlapped by an adjacenthigher one of said vertical sections in the direction of transverse flowof the fluid.
 8. A reactor according to claim 7, wherein said verticalsections each have an angled upper end and a flat lower end.
 9. Areactor according to claim 8, wherein said stabilizing grate iscomprised of individual stabilizing sections for each said verticalsection, wherein each said stabilizing section is connected to said flatlower end of a corresponding one of said vertical section.
 10. A reactoraccording to claim 7, wherein said slot-limiting elements of each saidvertical section are aligned with said slot-limiting elements ofrespective neighboring ones of said vertical sections.
 11. A reactoraccording to claim 1, wherein said slotted hole screen limits saidreactor on an outlet side thereof.
 12. A reactor according to claim 11,wherein said slats are slanted in an upward direction.
 13. A reactoraccording to claim 12, wherein said slats are slanted at an angle ofbetween 25 to 35° to the vertical.
 14. A reactor according to claim 12,wherein said stabilizing grate further comprises substantially verticalchannels, each said vertical channel defined between two neighboringones of said connecting strips and serving to remove very fine particlesof the adsorption medium penetrating said wall component, and whereinsaid slats are slanted such that the very fine particles of theadsorption medium are guided into said channels by gravity.
 15. Areactor according to claim 1, wherein said fluidized bed of said reactoris divided by at least one said fluid-permeable wall components into afirst and a second compartment and wherein said slats are downwardlyslanted.
 16. A reactor according to claim 15, wherein said slats areslanted at an angle of between 15 and 25° relative to the vertical. 17.A reactor according to claim 15, further comprising a first removaldevice for said first compartment and a second removal device for saidsecond compartment for selectively removing the adsorption medium fromand adjusting the adsorption medium in said first and said secondcompartments.
 18. A reactor according to claim 15, wherein saidfluidized bed has a first said fluid-permeable wall component as aninlet and a second said fluid-permeable wall component as an outlet andwherein a first distance between said at least one fluid-permeable wallcomponent dividing said fluidized bed and said outlet is multiple timesgreater than a second distance between said at least one fluid-permeablewall component dividing said fluidized bed and said inlet.
 19. Afluid-permeable wall component in a sandwich-type construction,comprised of:a substantially vertical slotted hole screen withsubstantially parallel extending substantially vertical slot-limitingelements; and a stabilizing grate comprising:a) connecting rodsextending transverse to said slot-limiting elements; and b) alouver-type construction with slats extending transverse to saidslot-limiting elements, wherein said slats are slanted relative to saidslot-limiting elements.
 20. A fluid-permeable wall component accordingto claim 19, wherein said stabilizing grate further comprises aplurality of connecting strips connected to said connecting rods in acrossed arrangement.
 21. A fluid-permeable wall component according toclaim 20, wherein said slot-limiting elements, said connecting bars,said connecting strips, and edges of said slats facing said stabilizinggrate are connected in an alternately perpendicularly crossed manner inthe sequence given.
 22. A fluid-permeable wall component according toclaim 21, wherein said slot-limiting elements are spot-welded to saidconnecting rods.
 23. A fluid-permeable wall component according to claim19, wherein said stabilizing grate further comprises substantiallyvertical channels, each said vertical channel defined between twoneighboring ones of said connecting strips and serving to remove veryfine particles penetrating said wall component.
 24. A fluid-permeablewall component according to claim 19, wherein said slot-limitingelements have a substantially triangular cross-section with three sidesand three corners, with one said side forming a limiting surface of saidfluid-permeable wall component and with one said corner opposite saidone side connected to said connecting rods of said stabilizing grate.